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- /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
- *
- * The contents of this file are subject to the Netscape Public License
- * Version 1.0 (the "NPL"); you may not use this file except in
- * compliance with the NPL. You may obtain a copy of the NPL at
- * http://www.mozilla.org/NPL/
- *
- * Software distributed under the NPL is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
- * for the specific language governing rights and limitations under the
- * NPL.
- *
- * The Initial Developer of this code under the NPL is Netscape
- * Communications Corporation. Portions created by Netscape are
- * Copyright (C) 1998 Netscape Communications Corporation. All Rights
- * Reserved.
- */
-
- /* *
- *
- *
- * shexp.c: shell-like wildcard match routines
- *
- * See shexp.h for public documentation.
- *
- * Rob McCool
- *
- */
-
- #include "xp_reg.h"
- #include "xp.h"
-
-
- /* ----------------------------- shexp_valid ------------------------------ */
-
-
- PRIVATE int
- _valid_subexp(char *exp, char stop)
- {
- register int x,y,t;
- int nsc,np,tld;
-
- x=0;nsc=0;tld=0;
-
- while(exp[x] && (exp[x] != stop)) {
- switch(exp[x]) {
- case '~':
- if(tld) return INVALID_SXP;
- else ++tld;
- case '*':
- case '?':
- case '^':
- case '$':
- ++nsc;
- break;
- case '[':
- ++nsc;
- if((!exp[++x]) || (exp[x] == ']'))
- return INVALID_SXP;
- for(++x;exp[x] && (exp[x] != ']');++x)
- if(exp[x] == '\\')
- if(!exp[++x])
- return INVALID_SXP;
- if(!exp[x])
- return INVALID_SXP;
- break;
- case '(':
- ++nsc;np = 0;
- while(1) {
- if(exp[++x] == ')')
- return INVALID_SXP;
- for(y=x;(exp[y]) && (exp[y] != '|') && (exp[y] != ')');++y)
- if(exp[y] == '\\')
- if(!exp[++y])
- return INVALID_SXP;
- if(!exp[y])
- return INVALID_SXP;
- if(exp[y] == '|')
- ++np;
- t = _valid_subexp(&exp[x],exp[y]);
- if(t == INVALID_SXP)
- return INVALID_SXP;
- x+=t;
- if(exp[x] == ')') {
- if(!np)
- return INVALID_SXP;
- break;
- }
- }
- break;
- case ')':
- case ']':
- return INVALID_SXP;
- case '\\':
- if(!exp[++x])
- return INVALID_SXP;
- default:
- break;
- }
- ++x;
- }
- if((!stop) && (!nsc))
- return NON_SXP;
- return ((exp[x] == stop) ? x : INVALID_SXP);
- }
-
- PUBLIC int
- XP_RegExpValid(char *exp)
- {
- int x;
-
- x = _valid_subexp(exp, '\0');
- return (x < 0 ? x : VALID_SXP);
- }
-
-
- /* ----------------------------- shexp_match ----------------------------- */
-
-
- #define MATCH 0
- #define NOMATCH 1
- #define ABORTED -1
-
- PRIVATE int _shexp_match(char *str, char *exp, Bool case_insensitive);
-
- PRIVATE int
- _handle_union(char *str, char *exp, Bool case_insensitive)
- {
- char *e2 = (char *) XP_ALLOC(sizeof(char)*strlen(exp));
- register int t,p2,p1 = 1;
- int cp;
-
- while(1) {
- for(cp=1;exp[cp] != ')';cp++)
- if(exp[cp] == '\\')
- ++cp;
- for(p2 = 0;(exp[p1] != '|') && (p1 != cp);p1++,p2++) {
- if(exp[p1] == '\\')
- e2[p2++] = exp[p1++];
- e2[p2] = exp[p1];
- }
- for (t=cp+1; ((e2[p2] = exp[t]) != 0); ++t,++p2) {}
- if(_shexp_match(str,e2, case_insensitive) == MATCH) {
- XP_FREE(e2);
- return MATCH;
- }
- if(p1 == cp) {
- XP_FREE(e2);
- return NOMATCH;
- }
- else ++p1;
- }
- }
-
-
- PRIVATE int
- _shexp_match(char *str, char *exp, Bool case_insensitive)
- {
- register int x,y;
- int ret,neg;
-
- ret = 0;
- for(x=0,y=0;exp[y];++y,++x) {
- if((!str[x]) && (exp[y] != '(') && (exp[y] != '$') && (exp[y] != '*'))
- ret = ABORTED;
- else {
- switch(exp[y]) {
- case '$':
- if( (str[x]) )
- ret = NOMATCH;
- else
- --x; /* we don't want loop to increment x */
- break;
- case '*':
- while(exp[++y] == '*'){}
- if(!exp[y])
- return MATCH;
- while(str[x]) {
- switch(_shexp_match(&str[x++],&exp[y], case_insensitive)) {
- case NOMATCH:
- continue;
- case ABORTED:
- ret = ABORTED;
- break;
- default:
- return MATCH;
- }
- break;
- }
- if((exp[y] == '$') && (exp[y+1] == '\0') && (!str[x]))
- return MATCH;
- else
- ret = ABORTED;
- break;
- case '[':
- neg = ((exp[++y] == '^') && (exp[y+1] != ']'));
- if (neg)
- ++y;
-
- if ((isalnum(exp[y])) && (exp[y+1] == '-') &&
- (isalnum(exp[y+2])) && (exp[y+3] == ']'))
- {
- int start = exp[y], end = exp[y+2];
-
- /* Droolproofing for pinheads not included */
- if(neg ^ ((str[x] < start) || (str[x] > end))) {
- ret = NOMATCH;
- break;
- }
- y+=3;
- }
- else {
- int matched;
-
- for (matched=0;exp[y] != ']';y++)
- matched |= (str[x] == exp[y]);
- if (neg ^ (!matched))
- ret = NOMATCH;
- }
- break;
- case '(':
- return _handle_union(&str[x],&exp[y], case_insensitive);
- break;
- case '?':
- break;
- case '\\':
- ++y;
- default:
- if(case_insensitive)
- {
- if(toupper(str[x]) != toupper(exp[y]))
- ret = NOMATCH;
- }
- else
- {
- if(str[x] != exp[y])
- ret = NOMATCH;
- }
- break;
- }
- }
- if(ret)
- break;
- }
- return (ret ? ret : (str[x] ? NOMATCH : MATCH));
- }
-
- PUBLIC int
- XP_RegExpMatch(char *str, char *xp, Bool case_insensitive) {
- register int x;
- char *exp = 0;
-
- StrAllocCopy(exp, xp);
-
- if(!exp)
- return 1;
-
- for(x=strlen(exp)-1;x;--x) {
- if((exp[x] == '~') && (exp[x-1] != '\\')) {
- exp[x] = '\0';
- if(_shexp_match(str,&exp[++x], case_insensitive) == MATCH)
- goto punt;
- break;
- }
- }
- if(_shexp_match(str,exp, FALSE) == MATCH) {
- XP_FREE(exp);
- return 0;
- }
-
- punt:
- XP_FREE(exp);
- return 1;
- }
-
-
- /* ------------------------------ shexp_cmp ------------------------------- */
-
- PUBLIC int
- XP_RegExpSearch(char *str, char *exp)
- {
- switch(XP_RegExpValid(exp))
- {
- case INVALID_SXP:
- return -1;
- case NON_SXP:
- return (strcmp(exp,str) ? 1 : 0);
- default:
- return XP_RegExpMatch(str, exp, FALSE);
- }
- }
-
- PUBLIC int
- XP_RegExpCaseSearch(char *str, char *exp)
- {
- switch(XP_RegExpValid(exp))
- {
- case INVALID_SXP:
- return -1;
- case NON_SXP:
- return (strcmp(exp,str) ? 1 : 0);
- default:
- return XP_RegExpMatch(str, exp, TRUE);
- }
- }
-
-